how about the pan/filter. Is there a chance that in pumping the fluid that parts of the filter will break away and create an environment for damage? (I could be making this up) Thinking about paying to have this done but it looks so easy. Was thinking I would rather pay and have the pan/filter replaced as well. Also, pumping it in easy? Or does it try to leak out everywhere. I have that same transfer pump, it would be nice if I knew it worked.

There's no filter. Kinda hard to mess this up. Just make sure you use the right and correct amount of fluid.